It is still more than two months away from the January transfer window opening - but David Moyes is expected to be among the busier of the top flight bosses.
Sunderland brought in 10 new faces in the summer as Moyes reshaped the Black Cats squad.
But the club are yet to win a league game this season and find themselves propping up the Premier League table.
The next opportunity to strengthen the squad is in January, with a new striker set to be top of the wanted list with Moyes currently relying on Jermain Defoe, with Victor Anichebe yet to start a game.
Meanwhile, Ivorian centre-back Lamine Kone, Tunisian winger Wahbi Khazri and Gabonese central midfielder Didier Ndong are all set to be involved in the Africa Cup of Nations too.
Papy Djilobodji was not included in the recent Senegal squad, but a regular run in the Sunderland side will enhance his chances of a January call-up.
That means Moyes will also need to strengthen in defence and midfield too, with some of his key players potentially missing several weeks of the campaign.
We take a look at five possible January signings for the Black Cats:
Sunderland are weighing up a January move for FC Copenhagen striker Santander - but face tough competition for his signature.
Premier League rivals Everton and Swansea City plus French side Lyon are also tracking the 25-year-old.
Sunderland are understood to have recently sent scouts to watch Santander in Champions League Group G action against Club Brugge.
Sunderland are not blessed with a lot of natural left-backs, with Moyes admitting Patrick van Aanholt's best position is in a more advanced wing-back slot.
Centre-back Jason Denayer and right-back Javier Manquillo can fill in there, while Tommy Robson is pushing for a first team call.
One option, though, is a move for Bordeaux left-back Poundje.
Recent reports claimed representatives of the 24-year-old are anchoring for a January move to England. His deal at the Ligue 1 club is up at the end of the current season.
Newcastle United, Crystal Palace, Swansea City and West Brom have also been offered his services, according to reports.
Sunderland couldn't agree personal terms over a move for the Scotland international on deadline day, with Naismith remaining at Norwich City.
Naismith, 30, had confirmed that his agent was trying to thrash out a deal but one could not be struck and the deal collapsed.
The forward played under David Moyes at Everton and the Sunderland boss could go back in for him in January, with the Black Cats in need of reinforcements in the striking department.
If Sunderland went back in for him, it would have to be a permanent deal.
Premier League clubs can only have two domestic loans and Jason Denayer (Manchester City) and Adnan Januzaj (Manchester United) are already at the club.
Austrian central defensive pair of Martin Hinteregger and Aleksandar Dragovic:
Sunderland are yet to keep a clean sheet in the Premier League and Moyes could look to bring in additional cover in January.
The Black Cats recently sent a senior delegation of scouts to watch Wales’s World Cup qualifier in Austria, with defensive duo Martin Hinteregger and Aleksandar Dragovic being watched.
The pair helped Austria tot up six clean sheets in their Euro 2016 qualifying group.
However, any move for Dragovic would look to be a non-starter given he is just months into a four-year deal with Bayer Leverkusen.
He moved to the Bundesliga in the summer from Dynamo Kiev.
Hinteregger too now plays in Germany’s top division with Augsburg, for whom he joined in the summer.
He spent the second half of last season on loan at Borussia Monchengladbach from Red Bull Salzburg.